This training module was designed to help the user identify and grasp basic concepts associated with space travel and deep space missions. Separate sections deal with topics such as the physical environment of space (solar system, gravity, orbital mechanics), flight projects (mission concepts, system requirements, design, onboard systems and instruments), and flight operations (launch, cruise, encounter). ... Full description.

Users can access a variety of information about the The SOHO Extreme Ultraviolet Imaging Telescope, as well as maps, imagery, and data. A description of the instrument is provided, along with temperature maps, movies and images of eclipses, solar storms, and coronal mass ejections. Links to related sites are also included. Full description.

This site discusses the loss of ice from the West Antarctic Ice Sheet, which has been observed for the last thirty years. Topics include why, when, and how much ice was lost by the ice sheet since the last glacial maximum, and whether the ice sheet was ever smaller than it is today. Full description.

This is a news article on the International Conference on Atmospheric Electricity that was held in 1999. The article describes the use of wide-band interferometers (radio recievers) to construct three-dimensional maps of lightning within a storm. It also features links to other lightning-related sites. Full description.

This collection of visualizations produced by the NASA Laboratory for Atmospheres includes still images, movies, and 3D/VR images. Viewers can select images of hurricanes and other weather phenomena, the Earth from space, fires, ash clouds, and a space shuttle launch. Links to other sources of imagery are also provided. Full description.

This movie was assembled from images captured by the Solar Heliospheric Observatory (SOHO). It depicts a doomed comet curving in towards the sun and not reappearing, apparently having evaporated in the sun's atmosphere. Full description.

The Jet Propulsion Laboratory's (JPL) homepage provides links to spacecraft and mission information, imagery, news articles, events, features, and public services. Users can access articles and imagery from the Mars Rover and Cassini missions, images from the Spitzer Space Telescope, and an El Nino/La Nina Watch. Full description.

This is the homepage of the U.S. Navy's research lab in Monterey, California. Visitors can access materials on the lab's six major fields of endeavor: marine geosciences, acoustics, oceanography, marine meteorology, remote sensing, and space science. Links are provided to information on the lab's research projects, product demonstrations, a list of publications, collaborative projects in participation ... Full description.

This is the homepage of the U.S. Global Research Program (USGCRP), an initiative to support research on the interactions of natural and human-induced changes in the global environment and their implications for society. Visitors can study overviews of the topics of greatest interest to the USGCRP, which include atmospheric composition, climatic variability and change, global cycles for carbon and ... Full description.

This site offers access to real-time oceanographic and surface meteorological data from the TAO array of over 400 buoys in 70 moorings in the tropical Pacific Ocean. TAO datasets are typically used for monitoring and prediction of El Nino/La Nina events. At the data delivery page, users can select all or any combination of buoys, display type, data type(s), and time period. Other materials include ... Full description.